# -*- coding: utf8 -*-
#***************************************************************************
#*   Copyright (c) 2009 Yorik van Havre <yorik@uncreated.net>              *
#*                                                                         *
#*   This program is free software; you can redistribute it and/or modify  *
#*   it under the terms of the GNU Lesser General Public License (LGPL)    *
#*   as published by the Free Software Foundation; either version 2 of     *
#*   the License, or (at your option) any later version.                   *
#*   for detail see the LICENCE text file.                                 *
#*                                                                         *
#*   This program is distributed in the hope that it will be useful,       *
#*   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
#*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
#*   GNU Library General Public License for more details.                  *
#*                                                                         *
#*   You should have received a copy of the GNU Library General Public     *
#*   License along with this program; if not, write to the Free Software   *
#*   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
#*   USA                                                                   *
#*                                                                         *
#***************************************************************************

__title__  = "FreeCAD Draft Workbench - GUI part"
__author__ = "Yorik van Havre <yorik@uncreated.net>"
__url__ = "https://www.freecad.org"

## @package DraftGui
#  \ingroup DRAFT
#  \brief GUI elements and utilities of the Draft workbench
#
#  This module provides GUI tools for the Draft workbench, such as
#  toolbars and task panels, and Qt-dependent utilities such as
#  a delayed (todo) commit system

"""This is the GUI part of the Draft module.
Report to Draft.py for info
"""

import os
import sys
import math
import PySide.QtCore as QtCore
import PySide.QtGui as QtGui
import PySide.QtWidgets as QtWidgets

import FreeCAD
import FreeCADGui
import Draft
import DraftVecUtils
import WorkingPlane
from draftutils import params
from draftutils import utils
from draftutils.todo import todo
from draftutils.translate import translate
from draftutils.units import display_external

translate("draft", "Relative")
translate("draft", "Global")
translate("draft", "Continue")
translate("draft", "Close")
translate("draft", "Copy")
translate("draft", "Subelement mode")
translate("draft", "Fill")
translate("draft", "Exit")
translate("draft", "Snap On/Off")
translate("draft", "Increase snap radius")
translate("draft", "Decrease snap radius")
translate("draft", "Restrict X")
translate("draft", "Restrict Y")
translate("draft", "Restrict Z")
translate("draft", "Select edge")
translate("draft", "Add custom snap point")
translate("draft", "Length mode")
translate("draft", "Wipe")
translate("draft", "Set Working Plane")
translate("draft", "Cycle snap object")
translate("draft", "Undo last segment")

def _get_incmd_shortcut(itm):
    return params.get_param("inCommandShortcut" + itm).upper()


#---------------------------------------------------------------------------
# Customized widgets
#---------------------------------------------------------------------------

class DraftBaseWidget(QtWidgets.QWidget):
    def __init__(self,parent = None):
        super().__init__(parent)
    def eventFilter(self, widget, event):
        if (event.type() == QtCore.QEvent.KeyPress
            and event.text().upper() == _get_incmd_shortcut("CycleSnap")):
            if hasattr(FreeCADGui,"Snapper"):
                FreeCADGui.Snapper.cycleSnapObject()
            return True
        return super().eventFilter(widget, event)

class DraftDockWidget(DraftBaseWidget):
    """custom Widget that emits a resized() signal when resized"""
    def __init__(self,parent = None):
        super().__init__(parent)
    def resizeEvent(self,event):
        self.emit(QtCore.SIGNAL("resized()"))
    def changeEvent(self, event):
        if event.type() == QtCore.QEvent.LanguageChange:
            self.emit(QtCore.SIGNAL("retranslate()"))
        else:
            super().changeEvent(event)

class DraftLineEdit(QtWidgets.QLineEdit):
    """custom QLineEdit widget that has the power to catch Escape keypress"""
    def __init__(self, parent=None):
        super().__init__(parent)
    def keyPressEvent(self, event):
        if event.key() == QtCore.Qt.Key_Escape:
            self.emit(QtCore.SIGNAL("escaped()"))
        elif event.key() == QtCore.Qt.Key_Up:
            self.emit(QtCore.SIGNAL("up()"))
        elif event.key() == QtCore.Qt.Key_Down:
            self.emit(QtCore.SIGNAL("down()"))
        else:
            super().keyPressEvent(event)

class DraftTaskPanel:
    def __init__(self,widget,extra=None):
        if extra:
            if isinstance(extra,list):
                self.form = [widget] + extra
            else:
                self.form = [widget,extra]
        else:
            self.form = widget
    def getStandardButtons(self):
        return int(QtWidgets.QDialogButtonBox.Close)
    def accept(self):
        if hasattr(FreeCADGui,"draftToolBar"):
            return FreeCADGui.draftToolBar.validatePoint()
        else:
            if FreeCADGui.ActiveDocument:
                FreeCADGui.ActiveDocument.resetEdit()
            return True
    def reject(self):
        FreeCADGui.draftToolBar.isTaskOn = False
        FreeCADGui.draftToolBar.escape()
        if FreeCADGui.ActiveDocument:
            FreeCADGui.ActiveDocument.resetEdit()
        return True
    def isAllowedAlterDocument(self):
        return False

class DraftToolBar:
    """The Draft Task panel UI
    Draft Toolbar is the main ui of the Draft Module. Once displayed as a
    toolbar, now it define the ui of the Task Panel.
    Toolbar become obsolete due to lack of manteinence and was disabled
    by default in February 2020.
    Draft Ui Commands call and get information such as point coordinates,
    subcommands activation, continue mode, etc. from Task Panel Ui
    """
    def __init__(self):
        self.tray = None
        self.sourceCmd = None
        self.mouse = True
        self.cancel = None
        self.pointcallback = None

        # OBSOLETE BUT STILL USED BY SOME ADDONS AND MACROS
        self.color = QtGui.QColor(utils.rgba_to_argb(params.get_param_view("DefaultShapeLineColor")))
        self.facecolor = QtGui.QColor(utils.rgba_to_argb(params.get_param_view("DefaultShapeColor")))
        self.linewidth = params.get_param_view("DefaultShapeLineWidth")
        self.fontsize = params.get_param("textheight")

        self.paramconstr = utils.rgba_to_argb(params.get_param("constructioncolor"))
        self.constrMode = False
        self.continueMode = False
        self.relativeMode = True
        self.globalMode = False
        self.state = None
        self.textbuffer = []
        self.crossedViews = []
        self.isTaskOn = False
        self.fillmode = True
        self.mask = None
        self.alock = False
        self.x = 0
        self.y = 0
        self.z = 0
        self.lvalue = 0
        self.pvalue = 90
        self.avalue = 0
        self.angle = None
        self.radius = 0
        self.offset = 0
        self.uiloader = FreeCADGui.UiLoader()
        self.autogroup = None
        self.isCenterPlane = False
        self.input_fields = {
            "xValue":{"value":"x","unit":"Length"},
            "yValue":{"value":"y","unit":"Length"},
            "zValue":{"value":"z","unit":"Length"},
            "lengthValue":{"value":"lvalue","unit":"Length"},
            "radiusValue":{"value":"radius","unit":"Length"},
            "angleValue":{"value":"avalue","unit":"Angle"}
        }

        # add only a dummy widget, since widgets are created on demand
        self.baseWidget = DraftBaseWidget()
        self.tray = QtWidgets.QToolBar(None)
        self.tray.setObjectName("Draft tray")
        self.tray.setWindowTitle("Draft tray")
        self.toptray = self.tray
        self.bottomtray = self.tray
        self.setupTray()
        self.setupStyle()
        mw = FreeCADGui.getMainWindow()
        mw.addToolBar(self.tray)
        self.tray.setParent(mw)
        self.tray.hide()

#---------------------------------------------------------------------------
# General UI setup
#---------------------------------------------------------------------------

    def _pushbutton(self,name, layout, hide=True, icon=None,
                    width=None, checkable=False, square=False):
        button = QtWidgets.QPushButton(self.baseWidget)
        button.setObjectName(name)
        if square:
            button.setMaximumSize(QtCore.QSize(button.height(), button.height()))
            button.setFlat(True)
        if hide:
            button.hide()
        if icon:
            if icon.endswith(".svg"):
                button.setIcon(QtGui.QIcon(icon))
            else:
                button.setIcon(QtGui.QIcon.fromTheme(
                    icon, QtGui.QIcon(':/icons/'+icon+'.svg')))
        if checkable:
            button.setCheckable(True)
            button.setChecked(False)
        layout.addWidget(button)
        return button

    def _label (self,name, layout, hide=True, wrap=False):
        label = QtWidgets.QLabel(self.baseWidget)
        label.setObjectName(name)
        if wrap:
            label.setWordWrap(True)
        if hide: label.hide()
        layout.addWidget(label)
        return label

    def _lineedit (self,name, layout, hide=True, width=None):
        bsize = params.get_param("ToolbarIconSize", path="General") - 2
        lineedit = DraftLineEdit(self.baseWidget)
        lineedit.setObjectName(name)
        if hide: lineedit.hide()
        #if not width: width = 800
        #lineedit.setMaximumSize(QtCore.QSize(width,bsize))
        layout.addWidget(lineedit)
        return lineedit

    def _inputfield (self,name, layout, hide=True, width=None):
        inputfield = self.uiloader.createWidget("Gui::InputField")
        inputfield.setObjectName(name)
        if hide: inputfield.hide()
        if not width:
            sizePolicy = QtWidgets.QSizePolicy(
                QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Preferred)
            inputfield.setSizePolicy(sizePolicy)
            inputfield.setMinimumWidth(110)
        else:
            inputfield.setMaximumWidth(width)
        layout.addWidget(inputfield)
        return inputfield

    def _spinbox (self,name, layout, val=None, vmax=None,
                  hide=True, double=False, size=None):
        if double:
            sbox = QtWidgets.QDoubleSpinBox(self.baseWidget)
            sbox.setDecimals(params.get_param("Decimals", path="Units"))
        else:
            sbox = QtWidgets.QSpinBox(self.baseWidget)
        sbox.setObjectName(name)
        if vmax: sbox.setMaximum(vmax)
        if val: sbox.setValue(val)
        #if size: sbox.setMaximumSize(QtCore.QSize(size[0],size[1]))
        if hide: sbox.hide()
        layout.addWidget(sbox)
        return sbox

    def _checkbox (self,name, layout, checked=True, hide=True):
        chk = QtWidgets.QCheckBox(self.baseWidget)
        chk.setChecked(checked)
        chk.setObjectName(name)
        if hide: chk.hide()
        layout.addWidget(chk)
        return chk

    def _combo (self,name,layout,hide=True):
        cb = QtWidgets.QComboBox(self.baseWidget)
        cb.setObjectName(name)
        if hide: cb.hide()
        layout.addWidget(cb)

    def setupToolBar(self,task=False):
        """sets the draft toolbar up"""

        # command

        self.promptlabel = self._label("promptlabel", self.layout, hide=task)
        self.cmdlabel = self._label("cmdlabel", self.layout, hide=task)
        boldtxt = QtGui.QFont()
        boldtxt.setWeight(75)
        boldtxt.setBold(True)
        self.cmdlabel.setFont(boldtxt)

        # point

        xl = QtWidgets.QHBoxLayout()
        yl = QtWidgets.QHBoxLayout()
        zl = QtWidgets.QHBoxLayout()
        bl = QtWidgets.QHBoxLayout()
        self.layout.addLayout(xl)
        self.layout.addLayout(yl)
        self.layout.addLayout(zl)
        self.layout.addLayout(bl)
        self.labelx = self._label("labelx", xl)
        self.xValue = self._inputfield("xValue", xl) #width=60
        self.xValue.installEventFilter(self.baseWidget)
        self.xValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Length).UserString)
        self.labely = self._label("labely", yl)
        self.yValue = self._inputfield("yValue", yl)
        self.yValue.installEventFilter(self.baseWidget) # Required to detect snap cycling in case of Y constraining.
        self.yValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Length).UserString)
        self.labelz = self._label("labelz", zl)
        self.zValue = self._inputfield("zValue", zl)
        self.zValue.installEventFilter(self.baseWidget) # Required to detect snap cycling in case of Z constraining.
        self.zValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Length).UserString)
        self.pointButton = self._pushbutton("addButton", bl, icon="Draft_AddPoint")

        # text

        self.textValue = QtWidgets.QTextEdit(self.baseWidget)
        self.textValue.setObjectName("textValue")
        self.textValue.setTabChangesFocus(True)
        self.layout.addWidget(self.textValue)
        self.textValue.hide()
        tl = QtWidgets.QHBoxLayout()
        self.layout.addLayout(tl)
        self.textOkButton = self._pushbutton("textButton", tl, icon="button_valid")

        # additional line controls

        ll = QtWidgets.QHBoxLayout()
        al = QtWidgets.QHBoxLayout()
        self.layout.addLayout(ll)
        self.layout.addLayout(al)
        self.labellength = self._label("labellength", ll)
        self.lengthValue = self._inputfield("lengthValue", ll)
        self.lengthValue.installEventFilter(self.baseWidget) # Required to detect snap cycling if focusOnLength is True.
        self.lengthValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Length).UserString)
        self.labelangle = self._label("labelangle", al)
        self.angleLock = self._checkbox("angleLock",al,checked=self.alock)
        self.angleValue = self._inputfield("angleValue", al)
        self.angleValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Angle).UserString)

        # options

        fl = QtWidgets.QHBoxLayout()
        self.layout.addLayout(fl)
        self.numFacesLabel = self._label("numfaceslabel", fl)
        self.numFaces = self._spinbox("numFaces", fl, 3)
        ol = QtWidgets.QHBoxLayout()
        self.layout.addLayout(ol)
        rl = QtWidgets.QHBoxLayout()
        self.layout.addLayout(rl)
        self.labelRadius = self._label("labelRadius", rl)
        self.radiusValue = self._inputfield("radiusValue", rl)
        self.radiusValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Length).UserString)
        bl = QtWidgets.QHBoxLayout()
        self.layout.addLayout(bl)
        self.undoButton = self._pushbutton("undoButton", bl, icon='Draft_Rotate')
        bl = QtWidgets.QHBoxLayout()
        self.layout.addLayout(bl)
        self.finishButton = self._pushbutton("finishButton", bl, icon='Draft_Finish')
        bl = QtWidgets.QHBoxLayout()
        self.layout.addLayout(bl)
        self.closeButton = self._pushbutton("closeButton", bl, icon='Draft_Lock')
        bl = QtWidgets.QHBoxLayout()
        self.layout.addLayout(bl)
        self.wipeButton = self._pushbutton("wipeButton", bl, icon='Draft_Wipe')
        bl = QtWidgets.QHBoxLayout()
        self.layout.addLayout(bl)
        self.orientWPButton = self._pushbutton("orientWPButton", bl, icon='Draft_SelectPlane')
        bl = QtWidgets.QHBoxLayout()
        self.layout.addLayout(bl)
        self.selectButton = self._pushbutton("selectButton", bl, icon='view-select')

        # update modes from parameters:
        self.relativeMode = params.get_param("RelativeMode")
        self.globalMode = params.get_param("GlobalMode")
        self.fillmode = params.get_param("fillmode")
        self.continueMode = params.get_param("ContinueMode")

        # Note: The order of the calls to self._checkbox() below controls
        #       the position of the checkboxes in the task panel.

        # update checkboxes with parameters and internal modes:
        self.isRelative = self._checkbox("isRelative", self.layout, checked=self.relativeMode)
        self.isGlobal = self._checkbox("isGlobal", self.layout, checked=self.globalMode)
        self.hasFill = self._checkbox("hasFill", self.layout, checked=self.fillmode)
        self.continueCmd = self._checkbox("continueCmd", self.layout, checked=self.continueMode)

        # update checkboxes without parameters and without internal modes:
        self.occOffset = self._checkbox("occOffset", self.layout, checked=False)

        # update checkboxes with parameters but without internal modes:
        # self.isCopy is also updated in modUi ("CopyMode") and offsetUi ("OffsetCopyMode")
        self.isCopy = self._checkbox("isCopy",
                                     self.layout,
                                     checked=params.get_param("CopyMode"))
        self.isSubelementMode = self._checkbox("isSubelementMode",
                                               self.layout,
                                               checked=params.get_param("SubelementMode"))

        # spacer
        spacerItem = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum,
                                       QtWidgets.QSizePolicy.Expanding)
        self.layout.addItem(spacerItem)

        QtCore.QObject.connect(self.xValue,QtCore.SIGNAL("valueChanged(double)"),self.changeXValue)
        QtCore.QObject.connect(self.yValue,QtCore.SIGNAL("valueChanged(double)"),self.changeYValue)
        QtCore.QObject.connect(self.zValue,QtCore.SIGNAL("valueChanged(double)"),self.changeZValue)
        QtCore.QObject.connect(self.lengthValue,QtCore.SIGNAL("valueChanged(double)"),self.changeLengthValue)
        QtCore.QObject.connect(self.angleValue,QtCore.SIGNAL("valueChanged(double)"),self.changeAngleValue)
        QtCore.QObject.connect(self.angleLock,QtCore.SIGNAL("stateChanged(int)"),self.toggleAngle)
        QtCore.QObject.connect(self.radiusValue,QtCore.SIGNAL("valueChanged(double)"),self.changeRadiusValue)
        QtCore.QObject.connect(self.xValue,QtCore.SIGNAL("returnPressed()"),self.checkx)
        QtCore.QObject.connect(self.yValue,QtCore.SIGNAL("returnPressed()"),self.checky)
        QtCore.QObject.connect(self.lengthValue,QtCore.SIGNAL("returnPressed()"),self.checklength)
        QtCore.QObject.connect(self.xValue,QtCore.SIGNAL("textEdited(QString)"),self.checkSpecialChars)
        QtCore.QObject.connect(self.yValue,QtCore.SIGNAL("textEdited(QString)"),self.checkSpecialChars)
        QtCore.QObject.connect(self.zValue,QtCore.SIGNAL("textEdited(QString)"),self.checkSpecialChars)
        QtCore.QObject.connect(self.lengthValue,QtCore.SIGNAL("textEdited(QString)"),self.checkSpecialChars)
        QtCore.QObject.connect(self.radiusValue,QtCore.SIGNAL("textEdited(QString)"),self.checkSpecialChars)
        QtCore.QObject.connect(self.angleValue,QtCore.SIGNAL("textEdited(QString)"),self.checkSpecialChars)
        QtCore.QObject.connect(self.zValue,QtCore.SIGNAL("returnPressed()"),self.validatePoint)
        QtCore.QObject.connect(self.pointButton,QtCore.SIGNAL("clicked()"),self.validatePoint)
        QtCore.QObject.connect(self.radiusValue,QtCore.SIGNAL("returnPressed()"),self.validatePoint)
        QtCore.QObject.connect(self.angleValue,QtCore.SIGNAL("returnPressed()"),self.validatePoint)
        QtCore.QObject.connect(self.textValue,QtCore.SIGNAL("textChanged()"),self.checkEnterText)
        QtCore.QObject.connect(self.textOkButton,QtCore.SIGNAL("clicked()"),self.sendText)
        QtCore.QObject.connect(self.zValue,QtCore.SIGNAL("returnPressed()"),self.setFocus)

        QtCore.QObject.connect(self.finishButton,QtCore.SIGNAL("pressed()"),self.finish)
        QtCore.QObject.connect(self.closeButton,QtCore.SIGNAL("pressed()"),self.closeLine)
        QtCore.QObject.connect(self.wipeButton,QtCore.SIGNAL("pressed()"),self.wipeLine)
        QtCore.QObject.connect(self.orientWPButton,QtCore.SIGNAL("pressed()"),self.orientWP)
        QtCore.QObject.connect(self.undoButton,QtCore.SIGNAL("pressed()"),self.undoSegment)
        QtCore.QObject.connect(self.selectButton,QtCore.SIGNAL("pressed()"),self.selectEdge)
        QtCore.QObject.connect(self.continueCmd,QtCore.SIGNAL("stateChanged(int)"),self.setContinue)

        QtCore.QObject.connect(self.isCopy,QtCore.SIGNAL("stateChanged(int)"),self.setCopymode)
        QtCore.QObject.connect(self.isSubelementMode, QtCore.SIGNAL("stateChanged(int)"), self.setSubelementMode)

        QtCore.QObject.connect(self.isRelative,QtCore.SIGNAL("stateChanged(int)"),self.setRelative)
        QtCore.QObject.connect(self.isGlobal,QtCore.SIGNAL("stateChanged(int)"),self.setGlobal)
        QtCore.QObject.connect(self.hasFill,QtCore.SIGNAL("stateChanged(int)"),self.setFill)
        QtCore.QObject.connect(self.baseWidget,QtCore.SIGNAL("resized()"),self.relocate)
        QtCore.QObject.connect(self.baseWidget,QtCore.SIGNAL("retranslate()"),self.retranslateUi)

    def setupTray(self):
        """sets draft tray buttons up"""

        self.wplabel = self._pushbutton(
            "wplabel", self.toptray, icon='Draft_SelectPlane',
            hide=False,width=120)

        self.styleButton = self._pushbutton(
            "stylebutton", self.toptray, icon='Draft_Apply', hide=False,
            width=120)
        self.setStyleButton()
        self.constrButton = self._pushbutton(
            "constrButton", self.toptray, hide=False, icon='Draft_Construction',
             checkable=True, square=True)
        self.constrColor = QtGui.QColor(self.paramconstr)
        self.autoGroupButton = self._pushbutton(
            "autoGroup", self.bottomtray,icon=":/icons/button_invalid.svg",
            hide=False, width=120)
        self.autoGroupButton.setText(translate("draft", "None"))
        self.autoGroupButton.setFlat(True)

        QtCore.QObject.connect(self.wplabel,QtCore.SIGNAL("pressed()"),self.selectplane)
        QtCore.QObject.connect(self.styleButton,QtCore.SIGNAL("pressed()"),self.setstyle)
        QtCore.QObject.connect(self.constrButton,QtCore.SIGNAL("toggled(bool)"),self.toggleConstrMode)
        QtCore.QObject.connect(self.autoGroupButton,QtCore.SIGNAL("pressed()"),self.runAutoGroup)

        QtCore.QTimer.singleShot(2000,self.retranslateTray) # delay so translations get a chance to load

    def setupStyle(self):
        style = "#constrButton:Checked {background-color: "
        style += self.getDefaultColor("constr",rgb=True)+" } "
        style += "#addButton:Checked, #delButton:checked, "
        style += "#sharpButton:Checked, "
        style += "#tangentButton:Checked, #symmetricButton:checked {"
        style += "background-color: rgb(20,100,250) }"
        self.baseWidget.setStyleSheet(style)
        #if hasattr(self,"tray"):
        #    self.tray.setStyleSheet(style)


#---------------------------------------------------------------------------
# language tools
#---------------------------------------------------------------------------

    def retranslateUi(self, widget=None):
        self.promptlabel.setText(translate("draft", "active command:"))
        self.cmdlabel.setText(translate("draft", "None"))
        self.cmdlabel.setToolTip(translate("draft", "Active Draft command"))
        self.xValue.setToolTip(translate("draft", "X coordinate of next point"))
        self.labelx.setText(translate("draft", "X"))
        self.labely.setText(translate("draft", "Y"))
        self.labelz.setText(translate("draft", "Z"))
        self.yValue.setToolTip(translate("draft", "Y coordinate of next point"))
        self.zValue.setToolTip(translate("draft", "Z coordinate of next point"))
        self.pointButton.setText(translate("draft", "Enter point"))
        self.pointButton.setToolTip(translate(
            "draft","Enter a new point with the given coordinates"))
        self.labellength.setText(translate("draft", "Length"))
        self.labelangle.setText(translate("draft", "Angle"))
        self.lengthValue.setToolTip(translate("draft", "Length of current segment"))
        self.angleValue.setToolTip(translate("draft", "Angle of current segment"))
        self.angleLock.setToolTip(translate(
            "draft", "Check this to lock the current angle")\
            + " (" + _get_incmd_shortcut("Length") + ")")
        self.labelRadius.setText(translate("draft", "Radius"))
        self.radiusValue.setToolTip(translate("draft", "Radius of Circle"))
        self.isRelative.setText(translate(
            "draft", "Relative") + " (" + _get_incmd_shortcut("Relative") + ")")
        self.isRelative.setToolTip(translate(
            "draft", "Coordinates relative to last point or to coordinate system "
                     + "origin\nif is the first point to set"))
        self.isGlobal.setText(translate(
            "draft", "Global") + " (" + _get_incmd_shortcut("Global") + ")")
        self.isGlobal.setToolTip(translate(
            "draft", "Coordinates relative to global coordinate system."
                     + "\nUncheck to use working plane coordinate system"))
        self.hasFill.setText(translate(
            "draft", "Filled") + " (" + _get_incmd_shortcut("Fill") + ")")
        self.hasFill.setToolTip(translate(
            "draft", "Check this if the object should appear as filled, "
                     + "otherwise it will appear as wireframe.\nNot available if "
                     + "Draft preference option 'Use Part Primitives' is enabled"))
        self.finishButton.setText(translate(
            "draft", "Finish") + " (" + _get_incmd_shortcut("Exit") + ")")
        self.finishButton.setToolTip(translate(
            "draft", "Finishes the current drawing or editing operation"))
        self.continueCmd.setToolTip(translate(
            "draft", "If checked, command will not finish until you press "
                     + "the command button again"))
        self.continueCmd.setText(translate(
            "draft", "Continue") + " (" + _get_incmd_shortcut("Continue") + ")")
        self.occOffset.setToolTip(translate(
            "draft", "If checked, an OCC-style offset will be performed"
                     + " instead of the classic offset"))
        self.occOffset.setText(translate("draft", "OCC-style offset"))

        self.undoButton.setText(translate("draft", "Undo") + " (" + _get_incmd_shortcut("Undo") + ")")
        self.undoButton.setToolTip(translate("draft", "Undo the last segment"))
        self.closeButton.setText(translate("draft", "Close") + " (" + _get_incmd_shortcut("Close") + ")")
        self.closeButton.setToolTip(translate("draft", "Finishes and closes the current line"))
        self.wipeButton.setText(translate("draft", "Wipe") + " (" + _get_incmd_shortcut("Wipe") + ")")
        self.wipeButton.setToolTip(translate("draft", "Wipes the existing segments of this line and starts again from the last point"))
        self.orientWPButton.setText(translate("draft", "Set WP") + " (" + _get_incmd_shortcut("SetWP") + ")")
        self.orientWPButton.setToolTip(translate("draft", "Reorients the working plane on the last segment"))
        self.selectButton.setText(translate("draft", "Select edge") + " (" + _get_incmd_shortcut("SelectEdge") + ")")
        self.selectButton.setToolTip(translate("draft", "Selects an existing edge to be measured by this dimension"))
        self.numFacesLabel.setText(translate("draft", "Sides"))
        self.numFaces.setToolTip(translate("draft", "Number of sides"))

        self.isCopy.setText(translate("draft", "Copy") + " (" + _get_incmd_shortcut("Copy") + ")")
        self.isCopy.setToolTip(translate("draft", "If checked, objects will be copied instead of moved"))
        self.isSubelementMode.setText(translate("draft", "Modify subelements") + " (" + _get_incmd_shortcut("SubelementMode") + ")")
        self.isSubelementMode.setToolTip(translate("draft", "If checked, subelements will be modified instead of entire objects"))
        self.textOkButton.setText(translate("draft", "Create text"))
        self.textOkButton.setToolTip(translate("draft", "Press this button to create the text object, or finish your text with two blank lines"))
        self.retranslateTray(widget)

        # Update the maximum width of the push buttons
        maxwidth = 66 # that's the default
        pb = []
        for i in range(self.layout.count()):
            w = self.layout.itemAt(i).widget()
            if w is not None and w.inherits('QPushButton'):
                pb.append(w)

        for i in pb:
            fm = QtGui.QFontMetrics(i.font())
            fw = fm.width(i.text())
            fw = max(fw, maxwidth)

        maxwidth = maxwidth + 16 +10 # add icon width and a margin
        for i in pb:
            i.setMaximumWidth(maxwidth)

    def retranslateTray(self,widget=None):

        self.styleButton.setToolTip(translate("draft", "Change default style for new objects"))
        self.constrButton.setToolTip(translate("draft", "Toggle construction mode"))
        self.autoGroupButton.setToolTip(translate("draft", "Autogroup off"))


#---------------------------------------------------------------------------
# Interface modes
#---------------------------------------------------------------------------

    def taskUi(self,title="Draft",extra=None,icon="Draft_Draft"):
        # reset InputField values
        self.reset_ui_values()
        self.isTaskOn = True
        todo.delay(FreeCADGui.Control.closeDialog,None)
        self.baseWidget = DraftBaseWidget()
        self.layout = QtWidgets.QVBoxLayout(self.baseWidget)
        self.setupToolBar(task=True)
        self.retranslateUi(self.baseWidget)
        self.panel = DraftTaskPanel(self.baseWidget,extra)
        todo.delay(FreeCADGui.Control.showDialog,self.panel)
        self.setTitle(title,icon)

    def redraw(self):
        """utility function that is performed after each clicked point"""
        self.checkLocal()

    def setFocus(self,f=None):
        if params.get_param("focusOnLength") and self.lengthValue.isVisible():
            self.lengthValue.setFocus()
            self.lengthValue.setSelection(0,self.number_length(self.lengthValue.text()))
        elif self.angleLock.isVisible() and self.angleLock.isChecked():
            self.lengthValue.setFocus()
            self.lengthValue.setSelection(0,self.number_length(self.lengthValue.text()))
        elif (f is None) or (f == "x"):
            self.xValue.setFocus()
            self.xValue.setSelection(0,self.number_length(self.xValue.text()))
        elif f == "y":
            self.yValue.setFocus()
            self.yValue.setSelection(0,self.number_length(self.yValue.text()))
        elif f == "z":
            self.zValue.setFocus()
            self.zValue.setSelection(0,self.number_length(self.zValue.text()))
        elif f == "radius":
            self.radiusValue.setFocus()
            self.radiusValue.setSelection(0,self.number_length(self.radiusValue.text()))

    def number_length(self, str):
        nl = 0
        for char in str:
            if char in "0123456789.,-":
                nl += 1
        return nl

    def extraLineUi(self):
        '''shows length and angle controls'''
        self.labellength.show()
        self.lengthValue.show()
        self.labelangle.show()
        self.angleValue.show()
        self.angleLock.show()
        self.angleLock.setChecked(False)

    def hideXYZ(self):
        ''' turn off all the point entry widgets '''
        self.labelx.hide()
        self.labely.hide()
        self.labelz.hide()
        self.labellength.hide()
        self.labelangle.hide()
        self.xValue.hide()
        self.yValue.hide()
        self.zValue.hide()
        self.pointButton.hide()
        self.lengthValue.hide()
        self.angleValue.hide()
        self.angleLock.hide()
        self.isRelative.hide()
        self.isGlobal.hide()

    def lineUi(self, title=translate("draft", "Line"), cancel=None, extra=None,
               getcoords=None,rel=False,icon="Draft_Line"):
        self.pointUi(title, cancel, extra, getcoords, rel, icon)
        self.extraLineUi()
        self.xValue.setEnabled(True)
        self.yValue.setEnabled(True)
        self.continueCmd.show()

    def wireUi(self, title=translate("draft", "DWire"), cancel=None, extra=None,
               getcoords=None, rel=False, icon="Draft_Wire"):
        self.pointUi(title, cancel, extra, getcoords, rel, icon)
        self.xValue.setEnabled(True)
        self.yValue.setEnabled(True)
        if params.get_param("UsePartPrimitives"):
            self.hasFill.setEnabled(False)
        else:
            self.hasFill.setEnabled(True)
        self.hasFill.show()
        self.finishButton.show()
        self.closeButton.show()
        self.wipeButton.show()
        self.orientWPButton.show()
        self.undoButton.show()
        self.continueCmd.show()

    def circleUi(self):
        self.pointUi(translate("draft", "Circle"),icon="Draft_Circle")
        self.extUi()
        self.isRelative.hide()

    def arcUi(self):
        self.pointUi(translate("draft", "Arc"),icon="Draft_Arc")
        self.continueCmd.show()
        self.isRelative.hide()

    def rotateSetCenterUi(self):
        self.pointUi(translate("draft", "Rotate"),icon="Draft_Rotate")
        self.modUi()
        self.isRelative.hide()

    def pointUi(self, title=translate("draft","Point"), cancel=None, extra=None,
                getcoords=None, rel=False, icon="Draft_Draft"):
        if cancel: self.cancel = cancel
        if getcoords: self.pointcallback = getcoords
        self.taskUi(title,extra,icon)
        self.xValue.setEnabled(True)
        self.yValue.setEnabled(True)
        self.isRelative.show()
        self.isGlobal.show()
        self.checkLocal()
        self.labelx.show()
        self.labely.show()
        self.labelz.show()
        self.xValue.show()
        self.yValue.show()
        self.zValue.show()
        # reset UI to (0,0,0) on start
        self.xValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Length).UserString)
        self.yValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Length).UserString)
        self.zValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Length).UserString)
        self.x = 0
        self.y = 0
        self.z = 0
        self.pointButton.show()
        if rel: self.isRelative.show()
        todo.delay(self.setFocus,None)
        self.xValue.selectAll()

    def labelUi(self,title=translate("draft","Label"),callback=None):
        w = QtWidgets.QWidget()
        w.setWindowTitle(translate("draft","Label type"))
        l = QtWidgets.QVBoxLayout(w)
        combo = QtWidgets.QComboBox()
        from draftobjects.label import get_label_types
        types = get_label_types()
        for s in types:
            combo.addItem(translate("Draft", s), userData=s)
        combo.setCurrentIndex(types.index(params.get_param("labeltype")))
        l.addWidget(combo)
        QtCore.QObject.connect(combo,QtCore.SIGNAL("currentIndexChanged(int)"),callback)
        self.pointUi(title=title, extra=w, icon="Draft_Label")

    def extraUi(self):
        pass

    def offsetUi(self):
        self.taskUi(translate("draft","Offset"), icon="Draft_Offset")
        self.radiusUi()
        self.isCopy.show()
        self.isCopy.setChecked(params.get_param("OffsetCopyMode"))
        self.occOffset.show()
        self.labelRadius.setText(translate("draft","Distance"))
        self.radiusValue.setToolTip(translate("draft", "Offset distance"))
        self.radiusValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Length).UserString)
        todo.delay(self.radiusValue.setFocus,None)
        self.radiusValue.selectAll()

    def offUi(self):
        todo.delay(FreeCADGui.Control.closeDialog,None)
        self.cancel = None
        self.sourceCmd = None
        self.pointcallback = None
        self.mask = None
        self.isTaskOn = False
        self.baseWidget = QtWidgets.QWidget()

    def trimUi(self,title=translate("draft","Trimex")):
        self.taskUi(title, icon="Draft_Trimex")
        self.radiusUi()
        self.labelRadius.setText(translate("draft","Distance"))
        self.radiusValue.setToolTip(translate("draft", "Offset distance"))
        self.radiusValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Length).UserString)
        todo.delay(self.radiusValue.setFocus,None)
        self.radiusValue.selectAll()

    def radiusUi(self):
        self.hideXYZ()
        self.labelRadius.setText(translate("draft", "Radius"))
        self.radiusValue.setToolTip(translate("draft", "Radius of Circle"))
        self.labelRadius.show()
        self.radiusValue.setText(FreeCAD.Units.Quantity(0,FreeCAD.Units.Length).UserString)
        self.radiusValue.show()
        todo.delay(self.radiusValue.setFocus,None)
        self.radiusValue.selectAll()

    def textUi(self):
        self.hideXYZ()
        self.textValue.show()
        self.textOkButton.show()
        self.textValue.setText('')
        todo.delay(self.textValue.setFocus,None)
        self.textbuffer=[]
        self.textline=0
        self.continueCmd.show()
        # Change the checkbox label as the in-command shortcut cannot be used:
        self.continueCmd.setText(translate("draft", "Continue"))

    def switchUi(self,store=True):
        if store:
            self.state = []
            self.state.append(self.labelx.isVisible())
            self.state.append(self.labely.isVisible())
            self.state.append(self.labelz.isVisible())
            self.state.append(self.xValue.isVisible())
            self.state.append(self.yValue.isVisible())
            self.state.append(self.zValue.isVisible())
            self.hideXYZ()
        else:
            if self.state:
                if self.state[0]:self.labelx.show()
                if self.state[1]:self.labely.show()
                if self.state[2]:self.labelz.show()
                if self.state[3]:self.xValue.show()
                if self.state[4]:self.yValue.show()
                if self.state[5]:self.zValue.show()
                self.state = None

    def setTitle(self,title,icon="Draft_Draft"):
        self.baseWidget.setWindowTitle(title)
        self.baseWidget.setWindowIcon(QtGui.QIcon(":/icons/"+icon+".svg"))

    def selectUi(self,extra=None, on_close_call=None):
        self.makeDumbTask(extra, on_close_call)

    def editUi(self):
        self.makeDumbTask(on_close_call=self.finish)

    def extUi(self):
        if params.get_param("UsePartPrimitives"):
            self.hasFill.setEnabled(False)
        else:
            self.hasFill.setEnabled(True)
        self.hasFill.show()
        self.continueCmd.show()

    def modUi(self):
        self.isCopy.show()
        self.isSubelementMode.show()
        self.isCopy.setChecked(params.get_param("CopyMode"))
        self.continueCmd.show()

    def checkLocal(self):
        """checks if x,y,z coords must be displayed as local or global"""
        if not self.globalMode and self.relativeMode:
            self.labelx.setText(translate("draft", "Local {}").format("\u0394X"))  # \u0394 = ∆ (Greek delta)
            self.labely.setText(translate("draft", "Local {}").format("\u0394Y"))
            self.labelz.setText(translate("draft", "Local {}").format("\u0394Z"))
        elif not self.globalMode and not self.relativeMode:
            self.labelx.setText(translate("draft", "Local {}").format("X"))
            self.labely.setText(translate("draft", "Local {}").format("Y"))
            self.labelz.setText(translate("draft", "Local {}").format("Z"))
        elif self.globalMode and self.relativeMode:
            self.labelx.setText(translate("draft", "Global {}").format("\u0394X"))
            self.labely.setText(translate("draft", "Global {}").format("\u0394Y"))
            self.labelz.setText(translate("draft", "Global {}").format("\u0394Z"))
        else:
            self.labelx.setText(translate("draft", "Global {}").format("X"))
            self.labely.setText(translate("draft", "Global {}").format("Y"))
            self.labelz.setText(translate("draft", "Global {}").format("Z"))

    def setNextFocus(self):
        def isThere(widget):
            if widget.isEnabled() and widget.isVisible():
                return True
            else:
                return False
        if self.isTaskOn:
            if isThere(self.xValue):
                self.setFocus()
            elif isThere(self.yValue):
                self.yValue.setFocus()
                self.yValue.selectAll()
            elif isThere(self.zValue):
                self.zValue.setFocus()
                self.zValue.selectAll()
            elif isThere(self.radiusValue):
                self.radiusValue.setFocus()
                self.radiusValue.selectAll()

    def relocate(self):
        """relocates the right-aligned buttons depending on the toolbar size"""
        if self.baseWidget.geometry().width() < 400:
            self.layout.setDirection(QtWidgets.QBoxLayout.TopToBottom)
        else:
            self.layout.setDirection(QtWidgets.QBoxLayout.LeftToRight)

    def makeDumbTask(self, extra=None, on_close_call=None):
        """create a dumb taskdialog to prevent deleting the temp object"""
        class TaskPanel:
            def __init__(self, extra=None, callback=None):
                if extra:
                    self.form = [extra]
                self.callback = callback
            def getStandardButtons(self):
                return int(QtWidgets.QDialogButtonBox.Close)
            def reject(self):
                if self.callback:
                    self.callback()
                return True
        todo.delay(FreeCADGui.Control.closeDialog,None)
        panel = TaskPanel(extra, on_close_call)
        todo.delay(FreeCADGui.Control.showDialog,panel)


#---------------------------------------------------------------------------
# Processing functions
#---------------------------------------------------------------------------

    def setContinue(self, val):
        params.set_param("ContinueMode", bool(val))
        self.continueMode = bool(val)

    # val=-1 is used to temporarily switch to relativeMode and disable the checkbox.
    # val=-2 is used to switch back.
    # Used by:
    #     gui_ellipses.py
    #     gui_rectangles.py
    #     gui_stretch.py
    def setRelative(self, val=-1):
        if val < 0:
            QtCore.QObject.disconnect(self.isRelative,
                                      QtCore.SIGNAL("stateChanged(int)"),
                                      self.setRelative)
            if val == -1:
                self.isRelative.setChecked(True)
                self.relativeMode = True
            elif val == -2:
                val = params.get_param("RelativeMode")
                self.isRelative.setChecked(val)
                self.relativeMode = val
            QtCore.QObject.connect(self.isRelative,
                                   QtCore.SIGNAL("stateChanged(int)"),
                                   self.setRelative)
        else:
            params.set_param("RelativeMode", bool(val))
            self.relativeMode = bool(val)
        self.checkLocal()

    def setGlobal(self, val):
        params.set_param("GlobalMode", bool(val))
        self.globalMode = bool(val)
        self.checkLocal()

    def setFill(self, val):
        params.set_param("fillmode", bool(val))
        self.fillmode = bool(val)

    def setCopymode(self, val):
        # special value for offset command
        if self.sourceCmd and self.sourceCmd.featureName == "Offset":
            params.set_param("OffsetCopyMode", bool(val))
        else:
            params.set_param("CopyMode", bool(val))

    def setSubelementMode(self, val):
        params.set_param("SubelementMode", bool(val))
        self.sourceCmd.set_ghosts()

    def checkx(self):
        if self.yValue.isEnabled():
            self.yValue.setFocus()
            self.yValue.setSelection(0,self.number_length(self.yValue.text()))
            self.updateSnapper()
        else:
            self.checky()

    def checky(self):
        if self.zValue.isEnabled():
            self.zValue.setFocus()
            self.zValue.setSelection(0,self.number_length(self.zValue.text()))
            self.updateSnapper()
        else:
            self.validatePoint()

    def checklength(self):
        if self.angleValue.isEnabled():
            self.angleValue.setFocus()
            self.angleValue.setSelection(0,self.number_length(self.angleValue.text()))
            self.updateSnapper()
        else:
            self.validatePoint()

    def validatePoint(self):
        """function for checking and sending numbers entered manually"""
        if self.sourceCmd or self.pointcallback:
            if (self.labelRadius.isVisible()):
                try:
                    #rad=float(self.radiusValue.text())
                    rad = self.radius
                except (ValueError, AttributeError):
                    print("debug: DraftGui.validatePoint: AttributeError")
                else:
                    self.sourceCmd.numericRadius(rad)
            elif (self.labelx.isVisible()):
                try:
                    #numx=float(self.xValue.text())
                    numx = self.x
                    #numy=float(self.yValue.text())
                    numy = self.y
                    #numz=float(self.zValue.text())
                    numz = self.z
                except (ValueError, AttributeError):
                    print("debug: DraftGui.validatePoint: AttributeError")
                else:
                    num_vec = FreeCAD.Vector(numx, numy, numz)
                    if self.pointcallback:
                        self.pointcallback(num_vec, self.globalMode, self.relativeMode)
                    else:
                        plane = WorkingPlane.get_working_plane(update=False)
                        ref_vec = FreeCAD.Vector(0, 0, 0)
                        if plane and not self.globalMode:
                            num_vec = plane.get_global_coords(num_vec, as_vector=True)
                            ref_vec = plane.get_global_coords(ref_vec)
                        if self.relativeMode and self.sourceCmd.node:
                            ref_vec = self.sourceCmd.node[-1]

                        numx, numy, numz = num_vec + ref_vec
                        self.sourceCmd.numericInput(numx, numy, numz)

            elif self.textValue.isVisible():
                return False
            else:
                FreeCADGui.ActiveDocument.resetEdit()
        return True

    def finish(self, cont=None):
        """finish button action"""
        if self.sourceCmd:
            if cont is None:
                cont = self.continueMode
            self.sourceCmd.finish(cont=cont)
        if self.cancel:
            self.cancel()
            self.cancel = None
        if FreeCADGui.ActiveDocument:
            FreeCADGui.ActiveDocument.resetEdit()

    def escape(self):
        """escapes the current command"""
        self.finish(cont=False)

    def closeLine(self):
        """close button action"""
        self.sourceCmd.finish(cont=self.continueMode, closed=True)
        FreeCADGui.ActiveDocument.resetEdit()

    def wipeLine(self):
        """wipes existing segments of a line"""
        self.sourceCmd.wipe()

    def orientWP(self):
        """reorients the current working plane"""
        self.sourceCmd.orientWP()

    def selectEdge(self):
        """allows the dimension command to select an edge"""
        if hasattr(self.sourceCmd,"selectEdge"):
            self.sourceCmd.selectEdge()

    def undoSegment(self):
        """undo last line segment"""
        if hasattr(self.sourceCmd,"undolast"):
            self.sourceCmd.undolast()

    def checkSpecialChars(self,txt):
        """checks for special characters in the entered coords that must be
        treated as shortcuts
        """

        if txt == "" or txt[0] in "0123456789.,-":
            self.updateSnapper()
            if txt[0] in "0123456789.,-":
                self.setMouseMode(False)
            return

        txt = txt[0].upper()
        spec = False
        # Most frequently used shortcuts first:
        if txt == _get_incmd_shortcut("Relative"):
            if self.isRelative.isVisible():
                self.isRelative.setChecked(not self.isRelative.isChecked())
                self.relativeMode = self.isRelative.isChecked()
            spec = True
        elif txt == _get_incmd_shortcut("Global"):
            if self.isGlobal.isVisible():
                self.isGlobal.setChecked(not self.isGlobal.isChecked())
                self.globalMode = self.isGlobal.isChecked()
            spec = True
        elif txt == _get_incmd_shortcut("Length"):
            if self.lengthValue.isVisible():
                self.constrain("angle")
                self.displayPoint()
            spec = True
        elif txt == _get_incmd_shortcut("RestrictX"):
            self.constrain("x")
            self.displayPoint()
            spec = True
        elif txt == _get_incmd_shortcut("RestrictY"):
            self.constrain("y")
            self.displayPoint()
            spec = True
        elif txt == _get_incmd_shortcut("RestrictZ"):
            self.constrain("z")
            self.displayPoint()
            spec = True
        elif txt == _get_incmd_shortcut("Copy"):
            if self.isCopy.isVisible():
                self.isCopy.setChecked(not self.isCopy.isChecked())
            spec = True
        elif txt == _get_incmd_shortcut("Exit"):
            if self.finishButton.isVisible():
                self.finish()
        elif txt == _get_incmd_shortcut("Close"):
            if self.closeButton.isVisible():
                self.closeLine()
        elif txt == _get_incmd_shortcut("AddHold"):
            if hasattr(FreeCADGui,"Snapper"):
                FreeCADGui.Snapper.addHoldPoint()
            spec = True
        elif txt == _get_incmd_shortcut("Snap"):
            self.togglesnap()
            spec = True
        elif txt == _get_incmd_shortcut("Fill"):
            if self.hasFill.isVisible():
                self.hasFill.setChecked(not self.hasFill.isChecked())
            spec = True
        elif txt == _get_incmd_shortcut("Continue"):
            if self.continueCmd.isVisible():
                self.toggleContinue()
            spec = True
        elif txt == _get_incmd_shortcut("SetWP"):
            if self.orientWPButton.isVisible():
                self.orientWP()
            spec = True
        elif txt == _get_incmd_shortcut("SelectEdge"):
            self.selectEdge()
            spec = True
        elif txt == _get_incmd_shortcut("SubelementMode"):
            if self.isSubelementMode.isVisible():
                self.isSubelementMode.setChecked(not self.isSubelementMode.isChecked())
            spec = True
        elif txt == _get_incmd_shortcut("Wipe"):
            if self.wipeButton.isVisible():
                self.wipeLine()
            spec = True
        elif txt == _get_incmd_shortcut("Undo"):
            self.undoSegment()
            spec = True
        elif txt == _get_incmd_shortcut("IncreaseRadius"):
            self.toggleradius(1)
            spec = True
        elif txt == _get_incmd_shortcut("DecreaseRadius"):
            self.toggleradius(-1)
            spec = True

        if spec:
            widget = self.baseWidget.focusWidget()
            field = self.input_fields[widget.objectName()]
            value = getattr(self, field["value"])
            unit = getattr(FreeCAD.Units, field["unit"])
            v = FreeCAD.Units.Quantity(value, unit).getUserPreferred()[0]
            widget.setProperty("text",v)
            widget.setFocus()
            widget.selectAll()
        self.updateSnapper()

    def updateSnapper(self):
        """updates the snapper track line if applicable"""
        if hasattr(FreeCADGui,"Snapper"):
            if FreeCADGui.Snapper.trackLine:
                if FreeCADGui.Snapper.trackLine.Visible:
                    last = FreeCAD.Vector(0,0,0)
                    if not self.xValue.isVisible():
                        return
                    if self.isRelative.isChecked():
                        if self.sourceCmd:
                            if hasattr(self.sourceCmd,"node"):
                                if self.sourceCmd.node:
                                    last = self.sourceCmd.node[-1]
                    plane = WorkingPlane.get_working_plane(update=False)
                    delta = plane.get_global_coords(
                        FreeCAD.Vector(self.x,self.y,self.z))
                    FreeCADGui.Snapper.trackLine.p2(last.add(delta))

    def setMouseMode(self, mode=True):
        """Sets self.mouse True (default) or False and sets a timer
        to set it back to True if applicable. self.mouse is then
        used by gui_tools_utils.get_point() to know if the mouse can
        update field values and point position or not."""
        if mode == True:
            self.mouse = True
        else:
            delay = params.get_param("MouseDelay")
            if delay:
                if self.mouse is True:
                    self.mouse = False
                    QtCore.QTimer.singleShot(delay*1000, self.setMouseMode)

    def checkEnterText(self):
        """this function checks if the entered text ends with two blank lines"""
        t = self.textValue.toPlainText()
        if t.endswith("\n\n"):
            self.sendText()

    def sendText(self):
        """this function sends the entered text to the active draft command
        if enter has been pressed twice. Otherwise it blanks the line.
        """
        self.sourceCmd.text = self.textValue.toPlainText()\
            .replace("\\","\\\\")\
            .replace("\"","\\\"")\
            .replace("\'","\\\'")\
            .splitlines()
        self.sourceCmd.createObject()

    def displayPoint(self, point=None, last=None, plane=None, mask=None):
        """this function displays the passed coords in the x, y, and z widgets"""
        if not self.isTaskOn:
            return

        if not plane:
            plane = WorkingPlane.get_working_plane(update=False)
        # get coords to display
        if not last:
            if self.globalMode:
                last = FreeCAD.Vector(0,0,0)
            else:
                last = plane.position
        dp = None
        if point:
            dp = point
            if self.relativeMode: # and (last is not None):
                if self.globalMode:
                    dp = point - last
                else:
                    dp = plane.get_local_coords(point - last, as_vector=True)
            else:
                if self.globalMode:
                    dp = point
                else:
                    dp = plane.get_local_coords(point)
        # set widgets
        if dp:
            if self.mask in ['y','z']:
                self.xValue.setText(display_external(dp.x,None,'Length'))
            else:
                self.xValue.setText(display_external(dp.x,None,'Length'))
            if self.mask in ['x','z']:
                self.yValue.setText(display_external(dp.y,None,'Length'))
            else:
                self.yValue.setText(display_external(dp.y,None,'Length'))
            if self.mask in ['x','y']:
                self.zValue.setText(display_external(dp.z,None,'Length'))
            else:
                self.zValue.setText(display_external(dp.z,None,'Length'))

        # set length and angle
        if last and dp and plane:
            length, theta, phi = DraftVecUtils.get_spherical_coords(*dp)
            theta = math.degrees(theta)
            phi = math.degrees(phi)
            self.lengthValue.setText(display_external(length,None,'Length'))
            #if not self.angleLock.isChecked():
            self.angleValue.setText(display_external(phi,None,'Angle'))
            if not mask:
                # automask, phi is rounded to identify one of the below cases
                phi = round(phi, Draft.precision())
                if phi in [0,180,-180]:
                    mask = "x"
                elif phi in [90,270,-90,-270]:
                    mask = "y"

        # set masks
        if (mask == "x") or (self.mask == "x"):
            self.xValue.setEnabled(True)
            self.yValue.setEnabled(False)
            self.zValue.setEnabled(False)
            self.angleValue.setEnabled(False)
            self.setFocus()
        elif (mask == "y") or (self.mask == "y"):
            self.xValue.setEnabled(False)
            self.yValue.setEnabled(True)
            self.zValue.setEnabled(False)
            self.angleValue.setEnabled(False)
            self.setFocus("y")
        elif (mask == "z") or (self.mask == "z"):
            self.xValue.setEnabled(False)
            self.yValue.setEnabled(False)
            self.zValue.setEnabled(True)
            self.angleValue.setEnabled(False)
            self.setFocus("z")
        else:
            self.xValue.setEnabled(True)
            self.yValue.setEnabled(True)
            self.zValue.setEnabled(True)
            self.angleValue.setEnabled(True)
            self.setFocus()


    def getDefaultColor(self, typ, rgb=False):
        """gets color from the preferences or toolbar"""
        r = 0
        g = 0
        b = 0
        if typ == "snap":
            r, g, b, _ = utils.get_rgba_tuple(params.get_param("snapcolor"))
        elif typ == "ui":
            print("draft: deprecation warning: Do not use getDefaultColor(\"ui\") anymore - use getDefaultColor(\"line\") instead.")
            r = float(self.color.red() / 255.0)
            g = float(self.color.green() / 255.0)
            b = float(self.color.blue() / 255.0)
        elif typ == "line":
            r, g, b, _ = utils.get_rgba_tuple(params.get_param_view("DefaultShapeLineColor"))
        elif typ == "text":
            r, g, b, _ = utils.get_rgba_tuple(params.get_param("DefaultTextColor"))
        elif typ == "face":
            r, g, b, _ = utils.get_rgba_tuple(params.get_param_view("DefaultShapeColor"))
        elif typ == "constr":
            r, g, b, _ = utils.get_rgba_tuple(params.get_param("constructioncolor"))
        else:
            print("draft: error: couldn't get a color for ", typ, " typ.")
        if rgb:
            return("rgb(" + str(int(r * 255)) + "," + str(int(g * 255)) + "," + str(int(b * 255)) + ")")
        else:
            return (r,g,b)

    def cross(self,on=True):
        """deprecated"""
        pass

    def toggleConstrMode(self,checked):
        self.baseWidget.setStyleSheet(
            "#constrButton:Checked {background-color: "
            + self.getDefaultColor("constr",rgb=True)+" }")
        self.constrMode = checked

    def toggleContinue(self):
        FreeCAD.Console.PrintMessage("toggle continue\n")
        self.continueMode = not self.continueMode
        try:
            if hasattr(self,"continueCmd"):
                if self.continueCmd.isVisible():
                    self.continueCmd.toggle()
            if hasattr(self,"panel"):
                if hasattr(self.panel,"form"):
                    if isinstance(self.panel.form,list):
                        for w in self.panel.form:
                            c = w.findChild(QtWidgets.QCheckBox,"ContinueCmd")
                            if c:
                                c.toggle()
                    else:
                        c = self.panel.form.findChild(QtWidgets.QCheckBox,"ContinueCmd")
                        if c:
                            c.toggle()
        except Exception:
            pass

    def isConstructionMode(self):
        return self.tray is not None and self.constrButton.isChecked()

    def selectplane(self):
        FreeCADGui.runCommand("Draft_SelectPlane")

    def setstyle(self):
        FreeCADGui.runCommand("Draft_SetStyle")

    def setStyleButton(self):
        "sets icon and text on the style button"
        linecolor = QtGui.QColor(utils.rgba_to_argb(params.get_param_view("DefaultShapeLineColor")))
        facecolor = QtGui.QColor(utils.rgba_to_argb(params.get_param_view("DefaultShapeColor")))
        im = QtGui.QImage(32,32,QtGui.QImage.Format_ARGB32)
        im.fill(QtCore.Qt.transparent)
        pt = QtGui.QPainter(im)
        pt.setPen(QtGui.QPen(QtCore.Qt.black, 1, QtCore.Qt.SolidLine, QtCore.Qt.FlatCap))
        pt.setBrush(QtGui.QBrush(linecolor, QtCore.Qt.SolidPattern))
        pts = [QtCore.QPointF(4.0,4.0), QtCore.QPointF(4.0,26.0), QtCore.QPointF(26.0,4.0)]
        pt.drawPolygon(pts, QtCore.Qt.OddEvenFill)
        pt.setBrush(QtGui.QBrush(facecolor, QtCore.Qt.SolidPattern))
        pts = [QtCore.QPointF(28.0,28.0),QtCore.QPointF(8.0,28.0),QtCore.QPointF(28.0,8.0)]
        pt.drawPolygon(pts,QtCore.Qt.OddEvenFill)
        pt.end()
        icon = QtGui.QIcon(QtGui.QPixmap.fromImage(im))
        linewidth = params.get_param_view("DefaultShapeLineWidth")
        fontsize = params.get_param("textheight")
        txt = str(linewidth) + "px | "\
            + FreeCAD.Units.Quantity(fontsize,FreeCAD.Units.Length).UserString
        self.styleButton.setIcon(icon)
        self.styleButton.setText(txt)

        # FOR BACKWARDS COMPATIBILITY
        self.color = linecolor
        self.facecolor = facecolor
        self.linewidth = linewidth
        self.fontsize = fontsize

    def popupMenu(self,llist,ilist=None,pos=None):
        """pops up a menu filled with the given list"""
        self.groupmenu = QtWidgets.QMenu()
        for i,l in enumerate(llist):
            if ilist:
                self.groupmenu.addAction(ilist[i],l)
            else:
                self.groupmenu.addAction(l)
        if not pos:
            pos = FreeCADGui.getMainWindow().cursor().pos()
        self.groupmenu.popup(pos)
        QtCore.QObject.connect(self.groupmenu,QtCore.SIGNAL("triggered(QAction *)"),self.popupTriggered)

    def getIcon(self,iconpath):
        return QtGui.QIcon(iconpath)

    def popupTriggered(self,action):
        self.sourceCmd.proceed(str(action.text()))

    def setRadiusValue(self,val,unit=None):
        #print("DEBUG: setRadiusValue val: ", val, " unit: ", unit)
        if  not isinstance(val, (int, float)):       #??some code passes strings or ???
            t = val
        elif unit:
            t= display_external(val,None, unit)
        else:
            print("Error: setRadiusValue called for number without Dimension")
            t = display_external(val,None, None)
        self.radiusValue.setText(t)
        self.radiusValue.setFocus()

    def runAutoGroup(self):
        FreeCADGui.runCommand("Draft_AutoGroup")

    def setAutoGroup(self,value=None):
        if value is None:
            self.autogroup = None
            self.autoGroupButton.setText(translate("draft", "None"))
            self.autoGroupButton.setIcon(QtGui.QIcon.fromTheme('Draft_AutoGroup_off',
                                                               QtGui.QIcon(':/icons/button_invalid.svg')))
            self.autoGroupButton.setToolTip(translate("draft", "Autogroup off"))
            self.autoGroupButton.setDown(False)
        else:
            obj = FreeCAD.ActiveDocument.getObject(value)
            if obj:
                self.autogroup = value
                self.autoGroupButton.setText(obj.Label)
                self.autoGroupButton.setIcon(obj.ViewObject.Icon)
                self.autoGroupButton.setToolTip(translate("draft", "Autogroup:") + " " + obj.Label)
                self.autoGroupButton.setDown(False)
            else:
                self.autogroup = None
                self.autoGroupButton.setText(translate("draft", "None"))
                self.autoGroupButton.setIcon(QtGui.QIcon.fromTheme('Draft_AutoGroup_off',
                                                                   QtGui.QIcon(':/icons/button_invalid.svg')))
                self.autoGroupButton.setToolTip(translate("draft", "Autogroup off"))
                self.autoGroupButton.setDown(False)

    def getXPM(self,iconname,size=16):
        i = QtGui.QIcon(":/icons/"+iconname+".svg")
        p = i.pixmap(size,size)
        a = QtCore.QByteArray()
        b = QtCore.QBuffer(a)
        b.open(QtCore.QIODevice.WriteOnly)
        p.save(b,"XPM")
        b.close()
        return str(a)

    def togglesnap(self):
        FreeCADGui.doCommand('FreeCADGui.runCommand("Draft_Snap_Lock")')

    def toggleradius(self,val):
        if hasattr(FreeCADGui,"Snapper"):
            par = params.get_param("snapRange")
            params.set_param("snapRange", max(0, par+val))
            FreeCADGui.Snapper.showradius()

    def constrain(self,val):
        if val == "angle":
            self.alock = not(self.alock)
            self.angleLock.setChecked(self.alock)
        elif self.mask == val:
            self.mask = None
            if hasattr(FreeCADGui,"Snapper"):
                FreeCADGui.Snapper.mask = None
        else:
            self.mask = val
            if hasattr(FreeCADGui,"Snapper"):
                FreeCADGui.Snapper.mask = val

    def changeXValue(self,d):
        self.x = d
        if not self.xValue.hasFocus():
            return None
        self.update_spherical_coords()

    def changeYValue(self,d):
        self.y = d
        if not self.yValue.hasFocus():
            return None
        self.update_spherical_coords()

    def changeZValue(self,d):
        self.z = d
        if not self.zValue.hasFocus():
            return None
        self.update_spherical_coords()

    def changeRadiusValue(self,d):
        self.radius = d

    def changeLengthValue(self,d):
        self.lvalue = d
        if not self.lengthValue.hasFocus():
            return None
        self.update_cartesian_coords()

    def changeAngleValue(self,d):
        self.avalue = d
        if not self.angleValue.hasFocus():
            return None
        self.update_cartesian_coords()
        if self.angleLock.isChecked():
            if not self.globalMode:
                plane = WorkingPlane.get_working_plane(update=False)
                angle_vec = plane.get_global_coords(self.angle, as_vector=True)
            else:
                angle_vec = self.angle
            FreeCADGui.Snapper.setAngle(angle_vec)

    def toggleAngle(self,b):
        self.alock = self.angleLock.isChecked()
        self.update_cartesian_coords()
        if self.alock:
            if not self.globalMode:
                plane = WorkingPlane.get_working_plane(update=False)
                angle_vec = plane.get_global_coords(self.angle, as_vector=True)
            else:
                angle_vec = self.angle
            FreeCADGui.Snapper.setAngle(angle_vec)
        else:
            FreeCADGui.Snapper.setAngle()
            self.angle = None

    def update_spherical_coords(self):
        length, theta, phi = DraftVecUtils.get_spherical_coords(
            self.x,self.y,self.z)
        self.lvalue = length
        self.pvalue = math.degrees(theta)
        self.avalue = math.degrees(phi)
        self.angle = FreeCAD.Vector(DraftVecUtils.get_cartesian_coords(
            1, theta, phi))
        self.lengthValue.setText(display_external(self.lvalue,None,'Length'))
        self.angleValue.setText(display_external(self.avalue,None,'Angle'))

    def update_cartesian_coords(self):
        self.x, self.y, self.z = DraftVecUtils.get_cartesian_coords(
            self.lvalue,math.radians(self.pvalue),math.radians(self.avalue))
        self.angle = FreeCAD.Vector(DraftVecUtils.get_cartesian_coords(
            1, math.radians(self.pvalue), math.radians(self.avalue)))
        self.xValue.setText(display_external(self.x,None,'Length'))
        self.yValue.setText(display_external(self.y,None,'Length'))
        self.zValue.setText(display_external(self.z,None,'Length'))

#---------------------------------------------------------------------------
# TaskView operations
#---------------------------------------------------------------------------

    def setWatchers(self):
        class DraftCreateWatcher:
            def __init__(self):
                self.commands = ["Draft_Line","Draft_Wire",
                                 "Draft_Rectangle","Draft_Arc",
                                 "Draft_Circle","Draft_BSpline",
                                 "Draft_Text","Draft_Dimension",
                                 "Draft_ShapeString","Draft_BezCurve"]
                self.title = "Create objects"
            def shouldShow(self):
                return (FreeCAD.ActiveDocument is not None) and (not FreeCADGui.Selection.getSelection())

        class DraftModifyWatcher:
            def __init__(self):
                self.commands = ["Draft_Move","Draft_Rotate",
                                 "Draft_Scale","Draft_Offset",
                                 "Draft_Trimex","Draft_Upgrade",
                                 "Draft_Downgrade","Draft_Edit"]
                self.title = translate("draft", "Modify objects")
            def shouldShow(self):
                return (FreeCAD.ActiveDocument is not None) and (FreeCADGui.Selection.getSelection() != [])

        FreeCADGui.Control.addTaskWatcher([DraftCreateWatcher(),DraftModifyWatcher()])

    def changeEvent(self, event):
        if event.type() == QtCore.QEvent.LanguageChange:
            #print("Language changed!")
            self.ui.retranslateUi(self)

    def Activated(self):
        self.setWatchers()
        if hasattr(self,"tray"):
            self.tray.show()

    def Deactivated(self):
        if (FreeCAD.activeDraftCommand is not None):
            self.continueMode = False
            FreeCAD.activeDraftCommand.finish()
        FreeCADGui.Control.clearTaskWatcher()
        #self.tray = None
        if hasattr(self,"tray"):
            self.tray.hide()

    def reset_ui_values(self):
        """Method to reset task panel values"""
        self.x = 0
        self.y = 0
        self.z = 0
        self.lvalue = 0
        self.pvalue = 90
        self.avalue = 0
        self.angle = None
        self.radius = 0
        self.offset = 0


class FacebinderTaskPanel:
    '''A TaskPanel for the facebinder'''
    def __init__(self):

        self.obj = None
        self.form = QtWidgets.QWidget()
        self.form.setObjectName("FacebinderTaskPanel")
        self.grid = QtWidgets.QGridLayout(self.form)
        self.grid.setObjectName("grid")
        self.title = QtWidgets.QLabel(self.form)
        self.grid.addWidget(self.title, 0, 0, 1, 2)

        # tree
        self.tree = QtWidgets.QTreeWidget(self.form)
        self.grid.addWidget(self.tree, 1, 0, 1, 2)
        self.tree.setColumnCount(2)
        self.tree.setHeaderLabels(["Name","Subelement"])

        # buttons
        self.addButton = QtWidgets.QPushButton(self.form)
        self.addButton.setObjectName("addButton")
        self.addButton.setIcon(QtGui.QIcon(":/icons/Arch_Add.svg"))
        self.grid.addWidget(self.addButton, 3, 0, 1, 1)

        self.delButton = QtWidgets.QPushButton(self.form)
        self.delButton.setObjectName("delButton")
        self.delButton.setIcon(QtGui.QIcon(":/icons/Arch_Remove.svg"))
        self.grid.addWidget(self.delButton, 3, 1, 1, 1)

        QtCore.QObject.connect(self.addButton, QtCore.SIGNAL("clicked()"), self.addElement)
        QtCore.QObject.connect(self.delButton, QtCore.SIGNAL("clicked()"), self.removeElement)
        self.update()

    def isAllowedAlterSelection(self):
        return True

    def isAllowedAlterView(self):
        return True

    def getStandardButtons(self):
        return int(QtWidgets.QDialogButtonBox.Ok)

    def update(self):
        """fills the treewidget"""
        self.tree.clear()
        if self.obj:
            for f in self.obj.Faces:
                if isinstance(f[1],tuple):
                    for subf in f[1]:
                        item = QtWidgets.QTreeWidgetItem(self.tree)
                        item.setText(0,f[0].Name)
                        item.setIcon(0, QtGui.QIcon(":/icons/Part_3D_object.svg"))
                        item.setText(1,subf)
                else:
                    item = QtWidgets.QTreeWidgetItem(self.tree)
                    item.setText(0,f[0].Name)
                    item.setIcon(0, QtGui.QIcon(":/icons/Part_3D_object.svg"))
                    item.setText(1,f[1])
        self.retranslateUi(self.form)

    def addElement(self):
        if self.obj:
            for sel in FreeCADGui.Selection.getSelectionEx():
                if sel.HasSubObjects:
                    obj = sel.Object
                    for elt in sel.SubElementNames:
                        if "Face" in elt:
                            flist = self.obj.Faces
                            found = False
                            for face in flist:
                                if (face[0] == obj.Name):
                                    if isinstance(face[1],tuple):
                                        for subf in face[1]:
                                            if subf == elt:
                                                found = True
                                    else:
                                        if (face[1] == elt):
                                            found = True
                            if not found:
                                flist.append((obj,elt))
                                self.obj.Faces = flist
                                FreeCAD.ActiveDocument.recompute()
            self.update()

    def removeElement(self):
        if self.obj:
            it = self.tree.currentItem()
            if it:
                obj = FreeCAD.ActiveDocument.getObject(str(it.text(0)))
                elt = str(it.text(1))
                flist = []
                for face in self.obj.Faces:
                    if (face[0].Name != obj.Name):
                        flist.append(face)
                    else:
                        if isinstance(face[1],tuple):
                            for subf in face[1]:
                                if subf != elt:
                                    flist.append((obj,subf))
                        else:
                            if (face[1] != elt):
                                flist.append(face)
                self.obj.Faces = flist
                FreeCAD.ActiveDocument.recompute()
            self.update()

    def accept(self):
        FreeCAD.ActiveDocument.recompute()
        FreeCADGui.ActiveDocument.resetEdit()
        return True

    def retranslateUi(self, TaskPanel):
        TaskPanel.setWindowTitle(QtWidgets.QApplication.translate("draft", "Faces", None))
        self.delButton.setText(QtWidgets.QApplication.translate("draft", "Remove", None))
        self.addButton.setText(QtWidgets.QApplication.translate("draft", "Add", None))
        self.title.setText(QtWidgets.QApplication.translate("draft", "Facebinder elements", None))

#def translateWidget(w, context=None, disAmb=None):
#    '''translator for items where retranslateUi() is unavailable.
#    translates widget w and children.'''
#    #handle w itself
#    if w.metaObject().className() == "QWidget":
#        origText = None
#        origText = w.windowTitle()
#        if origText:
#            newText = translate(context, str(origText))
#            if newText:
#                w.setWindowTitle(newText)

#    #handle children
#    wKids = w.findChildren(QtWidgets.QWidget)
#    for i in wKids:
#        className = i.metaObject().className()
#        if hasattr(i,"text") and hasattr(i,"setText"):
#            origText = i.text()
#            newText = translate(context, str(origText))
#            if newText:
#                i.setText(newText)
#        elif hasattr(i,"title") and hasattr(i,"setTitle"):
#            origText = i.title()
#            newText = translate(context, str(origText))
#            if newText:
#                i.setTitle(newText)
#        elif hasattr(i,"itemText") and hasattr(i,"setItemText"):
#            for item in range(i.count()):
#                oldText = i.itemText(item)
#                newText = translate(context, str(origText))
#                if newText:
#                    i.setItemText(item,newText)
##for debugging:
##        else:
##            msg = "TranslateWidget: Can not translate widget: {0} type: {1}\n".format(w.objectName(),w.metaObject().className())
##            FreeCAD.Console.PrintMessage(msg)

if not hasattr(FreeCADGui,"draftToolBar"):
    FreeCADGui.draftToolBar = DraftToolBar()
#----End of Python Features Definitions----#
